I have a z/VM 4.4.0 system running guest LANs. The Q LAN DETAILS here also
gives weird netmask info. I noticed it with 4.3.0 as well; but since
everything works I just didn't worry about it. My VM TCP/IP stack (OSPF
MPROUTE) has 255.255.255.128 as does the Linux hsi0 device, but Q LAN
DETAILS shows this:
q lan details linuxlan
LAN SYSTEM LINUXLAN Type: HIPERS Active: 18 MAXCONN: INFINITE
PERSISTENT UNRESTRICTED MFS: 24576 ACCOUNTING: OFF
Adapter Owner: LINUX003 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.3 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX004 NIC: 1D00 Name: UNASSIGNED
Device: 1D02 Unit: 002 Role: DATA
VLAN: ANY Assigned by user
Unicast IP Addresses:
10.12.7.4 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX006 NIC: 1D00 Name: UNASSIGNED
Device: 1D02 Unit: 002 Role: DATA
VLAN: ANY Assigned by user
Unicast IP Addresses:
10.12.7.6 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX007 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.7 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX008 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.8 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX009 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.9 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX010 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.10 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX011 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.11 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX012 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.12 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX013 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.13 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX014 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.14 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX015 NIC: 1D00 Name: UNASSIGNED
Device: 1D02 Unit: 002 Role: DATA
VLAN: ANY Assigned by user
Unicast IP Addresses:
10.12.7.15 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
225.1.2.11 MAC: 01-00-5E-01-02-0B
Adapter Owner: LINUX016 NIC: 1D00 Name: UNASSIGNED
Device: 1D02 Unit: 002 Role: DATA
VLAN: ANY Assigned by user
Unicast IP Addresses:
10.12.7.16 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX017 NIC: 1D00 Name: UNASSIGNED
Device: 1D02 Unit: 002 Role: DATA
VLAN: ANY Assigned by user
Unicast IP Addresses:
10.12.7.17 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX100 NIC: 1D00 Name: UNASSIGNED
Device: 1D02 Unit: 002 Role: DATA
VLAN: ANY Assigned by user
Unicast IP Addresses:
10.12.7.100 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX101 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.101 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: LINUX102 NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
Unicast IP Addresses:
10.12.7.102 Mask: 255.255.255.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
Adapter Owner: TCPIP NIC: 1D00 Name: LINUXLAN
Device: 1D02 Unit: 002 Role: DATA
VLAN: ANY Assigned by user
Unicast IP Addresses:
10.12.7.126 Mask: 255.0.0.0
10.12.7.193 Mask: 255.0.0.0
10.12.10.1 Mask: 255.0.0.0
10.12.100.254 Mask: 255.0.0.0
10.12.105.3 Mask: 255.0.0.0
10.12.105.11 Mask: 255.0.0.0
10.12.105.19 Mask: 255.0.0.0
10.12.105.27 Mask: 255.0.0.0
Multicast IP Addresses:
224.0.0.1 MAC: 01-00-5E-00-00-01
224.0.0.5 MAC: 01-00-5E-00-00-05
224.0.0.6 MAC: 01-00-5E-00-00-06
Ready; T=0.01/0.01 15:12:32
My MPROUTE CONFIG for TCP/IP's device:
OSPF_Interface
IP_Address=10.12.7.126
Name=QDIO1
MTU=16384
Subnet_Mask=255.255.255.128
Subnet=Yes
Attaches_To_Area=10.12.0.0
Cost0=2
Router_Priority=1;
And what one of the Linux instances thinks:
sles8:~ # ifconfig hsi0
hsi0 Link encap:Ethernet HWaddr 00:00:00:00:00:00
inet addr:10.12.7.100 Bcast:10.12.7.127 Mask:255.255.255.128
inet6 addr: fe80::200:ff:fe00:0/64 Scope:Link
UP BROADCAST RUNNING NOARP MULTICAST MTU:16384 Metric:1
RX packets:129486 errors:0 dropped:0 overruns:0 frame:0
TX packets:12588 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:100
RX bytes:17624027 (16.8 Mb) TX bytes:5724742 (5.4 Mb)
Not that that answers your question, but...
Marcy Cortes
